Furnace-door opener



June 17, 1930. A BANDOW 1,764,142

FURNACE DOOR OPENER Filed May 23, 1929 I 17-4 JO I a v 7 8 6 INVENTOR' Ada Bandow,

BY w r ATTORNE I Patented June 17, 1930 UNITE. STATES ADA BANDOW, or APPLE'ION, WISCONSIN FURNACE-DOOR OPENER Application filed May 23, 1929.

My invention relates to improvements in door openers, and specifically to operating mechanisms for swinging doors of furnaces, whereby a door may be swung open from a distance and resiliently returned to a closed position when desired.

This object I have accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Fig. 1 is a front elevation of a furnace equipped with my improved door opener, parts being broken away, removed or sectioned, and Fig. 2 is an enlarged detail view, partly in front elevation and partly in section of the pedally operable mechanism of my device.

Slight variations and modifications of my device may be made without departing from the principles of my invention or the scope of the appended claims.

The numeral 1 denotes an ordinary type of furnace having a fire-doorway 2 and a swinging door 3 therefor. I have shown in said Fig. 2 the operating mechanism of the device mounted upon a floor 19 above the basement in which said furnace is installed, but it is obvious that my invention may be placed upon the same floor as the furnace or elsewhere within the principles of my invention with but slight alterations in the structures thereof or in its arrangement of details. The object of placing the operating mechanism on the floor above is to permit of its use in conjunction with a furnace stoker to be actuated from the said upper floor and placed adjacent thereto, as shown in my previously filed application for patent Serial No. 206,916, filed July 19, 1927, but not here shown.

The upper floor 19 is apertured at 16 above a depending boxing 17 above said furnace, the boxing being apertured at its lower part. A pair of spaced vertically disposed hangers 10 are fixedly mounted in said floor aperture and have alined bearing holes through their lower ends to rockingly receive the pintles 9 of a swinging member 8 having depending spaced flat furcations 8. Projecting upwardly from the rock-body 8 is an arm 11 passing upwardly through the aperture 16 in the floor Serial No. 365,538.

19 to project thereabove and supplied on its top with a fixed pedal 12.

The arm 11 with its pedal 12 are normally kept in a vertical position by a coiled tension spring 14 connected to a peg 13 on the arm a little below the pedal and linked at its opposite end to a staple 15 in the wall of the aperture 16, and a coacting pawl 20 oppositely positioned to said spring engaging terminally a lug 23 on said arm and retained yieldingly by a small flat spring 21, the pawl having a trip arm 22 for manual use as desired. When the pedal and arm are swung to the right, the pawl rides upon the lug 23, but is kept in contact therewith by the spring 21. 0

A linking rod 6 has its hooked lower end 5 connected loosely to a staple or eye projection 4 on the top of the fire door 3 below. The upper end of said rod 6 is seated between the flat furcations of the rock-body 8 and has its git-. upper termination 7 bent over angularly to the left and seated loosely in a hole in the left-hand furcation of the rock-body.

When the rock-body 8 is a swung or rocked to the left as the arm 11 is rocked to the right, I the rod connection 6 swings open the door 3, the upper portion of the rod 6 between the furcations of the rock-body swinging on the termination 7 as a pintle in an opposite direction to the movement of the rod below to actcommodate the movements of the rod to the door 3 without binding, as the flat furcations keep the rod 6 therebetween constrained to swing sidewise on the pintle end 7 without defiections otherwise.

When the pedal 12 is relieved from foot pressure, the spring-14 returns the arm 11 to its upright position, where further movement. thereof to the left is restrained by the dentated pawl 20. 1 9

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is: o I

1. A door opening and closing mechanism of the character described, comprising the/ combination with a hinged door ofa furnace or other construction, of a resiliently con trolled operating swinging arm supplied with flat parallel furcations, and a linkage connecting member having one end loosely connected; 3

to said door and the other end seated between said flat furcations and pivoted in an enlarged hole in one ofthe furcations.

2. A door opening and closing mechanism of the character described, comprising the combination with a hinged door, of a resiliently controlled operating swinging arm supplied with terminalflat furcations, a resiliently controlled pawl loosely connected with said arm to limit its movements in one direction, and a connecting rod having one end loosely linked to said door and the other endhseated between the fiat furcations of said arm and pivoted in an enlarged hole in one of the: furcations.

In testimony whereof I aflix my signature.

ADA BANDOW. 

